Fix STATUS_NO_IMPERSONATION_TOKEN (0XC000005C)

This Windows error appears when a process tries to use an impersonation token that doesn't exist. Fix it by resetting permissions or restarting the service.

Yeah, that error is annoying—especially when it pops up right in the middle of something. Let's get it sorted.

The Quick Fix

Most of the time, this error comes from a service or application running under a user account that lost its impersonation token. The token is a temporary identity that lets a thread act as another user. When the token is missing or invalid, you get 0XC000005C.

The first thing to try: restart the service or application that threw the error. Open Services (Win+R, type services.msc), find the service, right-click, and hit Restart. If that doesn't work, reboot the machine. A reboot clears all tokens and forces the process to re-establish its identity.

If you're seeing this in a script or a scheduled task, run the task manually from Task Scheduler. That recreates the token. Sometimes it's that simple.

When Restarting Doesn't Cut It

If the error keeps coming back, the account the service or app runs under probably doesn't have the SeImpersonatePrivilege right. This privilege is what allows a process to impersonate another user. Without it, any attempt to create or use an impersonation token fails with this exact status code.

Here's how to add that privilege:

Open Local Security Policy (secpol.msc).
Go to Local Policies > User Rights Assignment.
Find Impersonate a client after authentication (that's the display name for SeImpersonatePrivilege).
Add the account the service runs under.
Run gpupdate /force in an elevated command prompt and restart the service.

On domain-joined machines, you might need to adjust Group Policy from the domain controller. But for a standalone box, local policy is enough.

Why This Fix Works

What's actually happening here is a permission gap. The service account can start, but when it tries to do something that requires acting on behalf of a user—like accessing a network share or reading a protected registry key—it needs to create an impersonation token. If the account lacks the privilege to do that, the token never gets created, and you're left staring at 0XC000005C.

By granting SeImpersonatePrivilege, you're telling Windows, "This account is allowed to pretend to be another user when necessary." That's a powerful right, so don't hand it out willy-nilly. But for a specific service account that legitimately needs it, it's the correct fix.

The reboot works because it resets the token cache. Sometimes a token gets corrupted or orphaned in memory. A fresh boot clears that out. It's a blunt instrument, but it works for one-off occurrences.

Less Common Variations

1. The App Is Running as Admin, But Still Fails

If you're running an app as Administrator and it still throws this, the issue might be User Account Control (UAC). UAC filters tokens when an admin logs in, stripping the high-integrity token. The app gets a restricted token, not the full one. To fix this, right-click the executable, choose Run as administrator, and check if the error goes away. If it does, the app needs a manifest that requests requireAdministrator execution level.

2. Errors in Windows Event Log

Sometimes you'll see 0XC000005C in the System or Application event log, but no visible error on screen. That's usually a background service failing silently. Look for events with source like Service Control Manager or Application Error. Note the service name, then check its account and privileges.

3. After a Windows Update

Occasionally a Windows Update changes default security settings or resets certain privileges. If this error started after a patch Tuesday, check the update history and see if any security updates touched authentication or impersonation. You might need to re-apply the privilege to your service account.

4. In a Remote Desktop Session

If you're hitting this while running something over RDP, the issue could be that the remote session lost its network token. Disconnecting and reconnecting the RDP session often fixes it. But if it's persistent, the group policy setting Always use classic logon might help.

Prevention

Here's how to keep this from becoming a recurring nightmare:

Run services under dedicated service accounts. Don't use a user account that logs in interactively. Create a service account with only the necessary privileges.
Audit your privileges. Periodically check which accounts have SeImpersonatePrivilege. Remove it from accounts that don't need it.
Monitor event logs. Set up alerts for events with this status code. Catching it early means you can restart the service before it becomes a user-facing problem.
Test after updates. After any Windows update, run a quick smoke test on critical services to catch regressions.

The real takeaway: 0XC000005C is a token problem, not a mystery. Solve it by ensuring the process can create impersonation tokens, and you're done. If it's a one-off, restart. If it's persistent, grant the privilege. Don't overthink it.